In the woods near Libby grows a quaking aspen five feet across. It is the biggest in the United States and Milarch has cloned it. He also cloned what is believed to be the nation's largest narrow leaf ...

The emerald ash borer is an invasive beetle wreaking havoc on America's ash trees. We explain how it got here and how it is ...

Winter isn’t the ideal season for pruning trees in Upstate New York, but it’s the best time to cut scion or twigs from ash trees in parts of the state where the species has been all but wiped out.

An invasive, tree-killing pest has made its way to Portland, spelling trouble for the many ash trees that cool residential neighborhoods on hot summer days. On Wednesday, Oregon forestry officials ...

PORTLAND Ore. (KPTV) - A bug that’s led to the destruction of hundreds of millions of trees has made its way into our area. It’s called the emerald ash borer, a type of beetle that lays eggs inside ...

This non-native beetle kills ash trees by feeding on the layer beneath the bark, cutting off water and nutrients. Approximately one-third of the trees in Fort Collins are ash trees, making the city's ...